DAY1SVR: Public Severe Weather Outlook (Automatic)

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WOUS40 KWNS 131001
PWOSPC
ARZ000-LAZ000-TXZ000-131800-

PUBLIC SEVERE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0501 AM CDT FRI APR 13 2007

...SEVERE THUNDERSTORMS EXPECTED OVER PARTS OF THE SOUTHERN PLAINS
LATER TODAY AND TONIGHT...

THE NWS STORM PREDICTION CENTER IN NORMAN OK IS FORECASTING THE
DEVELOPMENT OF A FEW STRONG TORNADOES OVER PARTS OF THE SOUTHERN
PLAINS LATER TODAY AND TONIGHT.

THE AREAS MOST LIKELY TO EXPERIENCE THIS ACTIVITY INCLUDE

EXTREME SOUTHWEST ARKANSAS
NORTHWEST LOUISIANA
CENTRAL AND NORTHEAST TEXAS

SURROUNDING THE MODERATE RISK AREA...THERE IS A SLIGHT RISK OF
SEVERE THUNDERSTORMS FROM SOUTH CENTRAL TEXAS NORTHWARD INTO
OKLAHOMA TODAY AND EASTWARD TO THE LOWER MISSISSIPPI VALLEY BY LATE
TONIGHT.

A STRONG UPPER LEVEL STORM SYSTEM OVER SOUTHERN ARIZONA THIS MORNING
WILL MOVE EASTWARD INTO WEST TEXAS THIS AFTERNOON...AND CONTINUE
NORTHEASTWARD OVER OKLAHOMA TONIGHT. THIS UPPER LEVEL SYSTEM WILL
BE ACCOMPANIED BY A SURFACE LOW PRESSURE CENTER THAT IS EXPECTED TO
DEVELOP EASTWARD INTO NORTH TEXAS BY LATE TODAY...AND INTO SOUTHERN
ARKANSAS OVERNIGHT. A DRYLINE WILL MOVE EASTWARD FROM WESTERN INTO
CENTRAL TEXAS BY THIS AFTERNOON...WHILE A WARM FRONT WILL LIFT
NORTHWARD INTO EAST AND NORTHEAST TEXAS...AS WELL AS NORTHERN
LOUISIANA. THESE SURFACE BOUNDARIES WILL HELP FOCUS THE SEVERE
THUNDERSTORM THREAT TODAY INTO TONIGHT.

EAST OF THE DRYLINE AND SOUTH OF THE WARM FRONT...A VERY MOIST AIR
MASS WILL OVERSPREAD MUCH OF CENTRAL AND EASTERN TEXAS. THIS
MOISTURE...ALONG WITH DAYTIME HEATING...WILL CONTRIBUTE TO AN
UNSTABLE ENVIRONMENT SUPPORTIVE OF SEVERE THUNDERSTORMS. IN
ADDITION...THE CHANGE IN WINDS FROM THE LOWER TO THE MIDDLE
ATMOSPHERE WILL BE FAVORABLE FOR SUPERCELL THUNDERSTORMS THAT COULD
PRODUCE A FEW STRONG TORNADOES...ALONG WITH LARGE HAIL AND DAMAGING
WINDS THIS AFTERNOON AND EVENING. THE AFTERNOON AND EVENING STORMS
SHOULD GROW INTO A LARGER SQUALL LINE BY TONIGHT WHILE MOVING ACROSS
SOUTHERN ARKANSAS AND LOUISIANA WITH A CONTINUED THREAT FOR DAMAGING
WINDS AND A FEW TORNADOES.

THOSE IN THE THREATENED AREA ARE URGED TO REVIEW SEVERE WEATHER
SAFETY RULES AND TO LISTEN TO RADIO...TELEVISION...AND NOAA WEATHER
RADIO FOR POSSIBLE WATCHES...WARNINGS...AND STATEMENTS LATER TODAY.

..THOMPSON.. 04/13/2007

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